Distance temperature apparatus.



H. Y. NORWOOD & F. W. STALKER. DISTANCE IEMPERATURE'APPARA'IUS.-

APPLICATION FILED JUNE I4,'I915.

Patented Sept. 3, 1918.

2 SHEETS-SHEET l.

' INVENTORS 1M HORNE m;

H YL NORWOUD & F. W. STALKER. fllSTANCE-TEMPEHAYURE APPARATUS.

APPUCATION FILED IUNEMQ1QI5,

EXT/7' WITNESSES:

UNITED STATES PATENT OFFICE.

HARRY Y. lQ'ORWOO'i) AND FREDERICK W. STALKER, OF ROCHESTER, NEW YORK, ASSIGNORS TO TAYLOR INSTRUMENT COMPANIES, OF ROCHESTER, NEXV YORK, A

GOEPOBATION OF NEW YORK.

DISTANCE TEMPERATURE APPARATUS.

Application filed June 14, 1915.

To all whom it may coaccrn:

it known that. we, HARRY Y. Nonwoon and FREDEKTCK V. STALKER, both of Rocheslier in the county of Monroe and State of New York, have invented certain new and useful IIHPI'OVQIIICIWS in Distance Temperature Apparatus; and We do hereby declare the follt'iwing lo be a full. clear, and exact, description of ighe same, rei'i cnco being had $20 the. accompanying drawings. Forming a part of this specification, and \o the reference-numerals marked thereon.

Our invention has for its purpose to pro-' vide a mechanism for determining at a ccntral station the, tei'npcratures at. a. plurality. of separated and distant points. either for indicating; or for rmwording in such a way as to insure accuracy in the readings. and from a'sti'ucture that is comparatively simple, bot-h in its construction and operation. A further object of the irn'ention is it} make it possible to obtain automatically a series of indications or records l lOl'l'l diilercnt points successively. or to obtain an individual reading at any time indcpendently oi the automatic operation. To these and other ends the. invention resides in certain improrcmerits and combinations oi parts all as will be l'iereinaiter more fully described. the nmel features being pointed out in The claim at the end oi The specification.

in ihc drawii'igs:

Figure l. is ;a transverse sectional View. showing a practical e nbodiincni of the in vention:

Fig. 2 is a (.iag LlllillfliI-lC view illustrating the arrangei'nentot' the controlling: switch and electric connections therewith:

Fig. 3 is a longitudinal sectional view of the casing showing the interior parts in elc- Eli'lOiiZ Fig. 4- is a detail sectional view of a portion of the switch. and

Fig. 5 is a detail elevation of the locking means for 'ircvcnl'ing reverse movemenl' of the switch.

Similar reference numerals in the several i'lQl'llL'H indicale the same parts.

The present.- eml'iodimen'li is an illustration of a praci'ieal method for carrying), out the features oi our improvement). and embodies a casing 1 within which is arranged a movable switch. prci'crably roliary and comprising a spindle 2 carrying a series of contacts Specification of Letters Patent.

Patent-ed Sept. 3, 1918.

Serial No. 34,074;

3 which are insulated from each other by the sections 4;, and arranged for cooperation with the several sets of contacts 5.

Each pair of contacts 5 is connected to a current actuated member, preferably in the form of a galvanometcr 6, and 7 designates a series of thermopilcs, each connected in series with the corresponding pair of con? tacts 5. It. will be understood that in refer ring to the iiherniopiles 7, we may employ, and intend to cover any form of temperature actuated current controlling device, such as will be affected by variations in the temperature condition and cause a corresponding moven'icnt of the-current actuated member. The, galvanomcter 6 includes an indicator 8 which may be provided With any convenient recording'means arranged to cooperate with a. chart 9. The. casing 1 is provided with a series of terminals 10 which connect with the several pairs of contacts and to which con -ll80ll0l1 is made from the'galvanomete'r 6 and the thermopiles 7.

The switch already described is arranged for continuous operation under normal conditions so as to automatically afford sucrrssive indications or readings of the temorder in which it would be efi'ected by the regular or normal operation. This We ac- (OlI'JpllHll by the provision of means for permittinp the switch to be rotated independently oi the motor which normally drives it, preferably by establishing a frictional connection between the motor and the switch. To this end the arbor 12 of the clock mech-- anism. constituting the driving" member, has fixed thereon a collar 13, the extension 14 of which loos ly engages the end of the spindle Q. Fixedly mounted on the latter is a collar 15 carrying a pin or projection 16 which engages a recess 17 in a disk 18, the latter being loose on the extension 1%. 19 is a spring disposed betwcen collar 13 and the disk 18 and acting to maintain the latter against the shoulder 20 with sufiicient fricopening 21' in the casing and is provided.

with a finger piece 22, enabling it to he ro- 5 tated manually when any particular reading "vent reverse manual operation of the is} desired, and under such conditions the disk 18 turns on the extension 14 independently of the latter, so that the switch can be operated to engage any one of the pairs of contacts 5 and thus' close the circuit through the selected thermopile. In order to preswitch the spindle 2 carries a toothed wheel 23 which is engaged by a pair of pawls 24:

and 25 connected liy a spring 26 in the manner shown in Fig. 5, and operating to prevent sufiicientg reverse movement of the switch to cause any damage to the conw tacts The structure which we have described is simple and comparatively economical to manufacture. It afiords an automatic operation, both certain and accurate, and efl'ective in obtaining a series of temperature readings from points located distantly with relation to a central station. A further advantage 'lies in the facility with which a 'reading can be selectively taken from any oneof the stations during the operation of the automatic controlling means and inde pendently of it. The invention is not to be limited to the particular form or arrangcment of parts disclosed in the application, since it includes any modifications that will act according to the principles and contemplated results of the present structure.

We claim as our invention:

In a distance temperature apparatus, the.

combination with an electric circuit including a current actuated member, of a plurality of thermopiles adapted to he successively connected with said current actuated member, a rotary switch actingto close the circuit through any one of said thermopile's, continuously operating mechanism for driv ing the switch, a frictionalconnection between the continuously operating mechanism and the switch permitting the latter to be moved independently of said mechanism and to close the circuit selectively through any of the thcrmopiles, and hand operated means for moving the switch independently of said mechanism.

HARRY Y. XUltWOOD. FREDE ICK W. ITALKER. Witnesses Isaac Mayra, JOHN H. NnUBnnT. 

